<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .container{
            display: grid;
            width: 400px;
            height: 300px;
            grid-template-columns: 200px 200px;
            grid-template-rows: 100px 100px 100px;
            text-align: center;
        }
        .a{
           /* grid-row-start: 1;
            grid-column-start: 1;
            grid-row-end: 3;
            grid-column-end: 3;*/
            grid-area: 1/1/3/3;
            background-color: #ed6000
        }
        .b{background-color: #ed1250;}
        .c{background-color: gold}
        .d{background-color: aquamarine}
        .e{background-color: pink}
    </style>
</head>
<body>
<div class="container">
    <div class="a">a</div>
    <div class="b">b</div>
    <div class="c">c</div>
    <div class="d">d</div>
    <div class="e">e</div>
</div>

</body>
</html>